Door-check.



i TED STATES PATENT Genion.

DOOR-CHECK.

SPEGIFLCATION forming part of Letters Patent No. 679,905, dated lAugust 6, 1901.

Application led August 18, 1900. Serial No. 27.326- (No model.)

To all whom it may concern.-

Be it known that I, CHARLES HERBERT OCUMPAUGH, a resident of Rochester, in the county of Monroe and State of New York,

sion by the opening of the door, and thereby adapted to close it.

The objects of the invention are to simplify the piston and valve constructions and improve the bearings of the former, to render the spring more accessible in the particular class of door-checks for reversal or for adjustment of tension, and to reduce the cost of manufacture.

Heretofore in this particular kind of doorchecks a spring-chamber has been mounted on the piston-chamber and the chamber and its spring have been arranged concentric with the piston-moving door-connected crank shaft or spindle, which arrangement renders the spring inaccessible for adjustment or reversal when the check is operatively connected to the door and its easing. Pistons of the kind contemplated by the present improvernent have been provided with two heads and an intermediate head-connecting portion, having a recess to reduce the friction-surface, said recess constituting a pocket for liquid. By the present improvement such liquid-holding recesses and a double pistonhead are avoided, the single head hereinafter described having xed thereto guides or iingers bearing on the inner surface of the cylinder in separate lines.

The present invention specifically relates, among other things, to the features just referred to; and it consists in the constructions hereinafter particularly pointed out.

In the accompanying drawings, Figure 1 is a central longitudinal section of a door-check, showing part of an arm by which it may be connected to a door. Fig. 2 is a section on line 2 2 of Fig. 1. Fig. 3 is a perspective of a valve.

Numeral 1 denotes aliquid-holding cylindrical chamber closed by a screw-threaded plate 2, as indicated. 3 denotes a piston Vfitted to move in said cylinder and provided with one or more guiding-fingers 4, with free ends bearing on the interior of the cylinder 1. The particular number, size, and form of these guides or fingers are not essential; but they are rnade long to provide a bearing on the cylinder sufficiently remote from the piston-head to guide itaccurately, and preferably they have eachA a comparatively small transverse dimension to reduce weight and friction. Three are illustrated, and either two Y or three are deemed preferable. As shown in the present instance, their free ends extend to near the cylinder end opposite that near which the piston-head moves, the head and the finger ends being on opposite sides of a piston-actuating shaft-crank, and the fingers or guides playing back and forth outside the crank and at the sides of the crank-shaft. The construction gives great steadiness and accuracy to the movements of the piston.

The piston is operatively connected by a rod 5 with a crank 7, having two arms 7X fixed to a spindle or shaft 6, rigidly connected to an arm 22, to be actuated by the opening of a door, to which said arm may be conneeted in usual manner. The' construction is such that in the arrangement illustrated the opening of the door moves the piston toward the left of the cylinder, which causes its liquid contents to pass to the right through the large opening S. The closing of the door returns the piston to the right; but this operation closes the passage 8 by means of a flap-valve 10, and a small conduit 9 is provided for the return of the liquid to the left of the piston, as necessary for the. last-mentioned movement of the latter. The napvalve in the present instance has two arms, each pivoted to a boss 1l on the piston.

l2 denotes a tube screwed into the piston and adapted to be adjusted back and forth by means of the stem 13, having a milled head 14 and a flattened part 15, fitting acorresponding hole 16X in the tube, whereby IOO said tube can be screwed in or out to vary the flow through the relief-port 9. The tube held in the piston and the piston are freely movable on the iiattened stem. formed in the piston, is adapted to receive the end of the stem. Y

The door is closed by a spring 17, fixed to a shaft 17X, operatively connected by gears to the arm 22, bearing on the door, the pistoncylinder and the spring-cylinder being fixed to the door-casing in any customary manner. The outer end of the spring is fixed to a cup 16, closing the spring chamber or cylinder 18, made preferably integral with the cylinder 1. Said cup is adjustably held in cylinder 18 by a pawl18 and a screw nut or shaft 17X. The inner end of cylinder 18 is closed bya screw'- threaded plate, in which the shaft 17 has a bearing. Said shaft has a bevelgear 19 meshing with a gear 2O,v fixed on a sleeve 23, which has a rack 24 engaged by a pawl 21, operatively carried by the door-connected arm 22. The swinging of the arm by opening the door turns sleeve 23 and gears 2O andA 19 and winds the spring. The same operation rotates the crank shaft or spindle 6 and moves the piston, as above described.

25 is a screw-threaded annulus forming a bearing for the sleeve 23 and closing the upper end of the gear-containing chamber 26, which by preference is formed integral with the piston and spring holding chambers. 'Ihe chamber 2G is closed below by a packed head 28', and 29 denotes a stuffing-box to close the joint at the shaft-bearing.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a door check and closer, the combinai tion of a liquid-holding piston-chamber, a distinct removable cover therefor, a piston in said chamber, a separate chamber containing a door-closing spring, and a third chamber inclosing mechanism voperatively connecting the spring and piston, the two latter chambers being arranged at right angles to each other and .provided each with an independent removable cover.

2. In a door check and closer,.the combination of an arm, a spindle at right angles to the arm, a piston-chamber, a piston driven by the spindle, a spring-containing chamber, a spring, and a spring-winding shaft in a plane parallel to the piston-rod.

3. In a door check and closer, a casing comprising in its construction three separate chambers, a liquid 'or piston chamber, a shaftchamber at right angles thereto and a springchamber'lyin g above the piston-chamber in a plane parallel thereto and on one side of the shaft-chamber, substantially as shown and described. p

4. In a door check and closer, the combina- A 1101@ 13X, Y

tion of a door-closing arm, a door-closing spring, a springcontaining chamber whose axis is in a plane parallel to the arm, and intermediate devices whereby the arm may put the spring under tension by the movement of said arm, said devices subsequently moving in reverse direction under the action of the spring.

5. In a door check and closer, the combination of a door-closing and spring-compressing arm, a spindle operatively connected to the arm, and an independent spring winding shaft mediately connected with the spindle whereby the spring may be put under tension and then -subsequently close the door.

6. In a door check and closer, an arm,a spindle connected to the arm, a spring, a rotatable spring-winding shaft situated at an angle to the spindle, and gears' to operatively con neet the said shaft and spindle.

' 7. Inadoor check and closer,an ar1n,a spin*- dle connected to the arm, a shaft at right angies to the spindle, gears operatively connecting the spindle and shaft, and a spring connected at one end to the shaft and at the other end to aY spring-adjusting device, and said device.

8. In a door check and closer, a liquid-holding chamber, a gear-containing chamber, and a spring-containing chamber, each having an independent removable cover whereby access may be had to each without disturbing another.

9. In a door check and closer, an arm with an attached spindle, a piston operatively connected to the spindle, and a spring-winding shaft connected to the spindle at a point between the arm and the piston.4

`10. In a door check and closer, a liquidholding chamber, a gear-containing chamber, an arm, a spring whose aXis is in a plane parallel to the arm, and means independent of the liquid-holding and gear-containing chambers for `adjusting the tension of the spring.

11. In a door check and closer, a liquidholding chamber, a gear-containing chamber, a door-closing and spring-compressing arm, a

spring whose axis is parallel to the arm,a

spring-containing chamber, and means for adjusting the tension of the spring from the exterior of the check and closer.

12. In a door-check, the combination of a cylinder, and a piston-head having fixed to its periphery guides with free ends bearing on the inner surface of the cylinder in separate mes.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

CHARLES HERBERTk OCUMIAUGH.

Witnesses: y

E. C. HEMPEL, A. M. ZIMMER.

IIO 

